Godot: C#: Project failed to build, "A Godot Engine build callback failed"

[11clock]

Godot version:
3.1 alpha 2

OS/device including version:
Windows 10

Issue description:
My working alpha 1 project fails to build in alpha 2, without a specified reason.

Steps to reproduce:
Try building the attached project in alpha 2.

BeardHeroes.zip

[David-Ochoa]

I can compile it with Godot_v3.1-alpha2_mono_win64, but I also had problems with other project and had to delete all folders inside %user%\AppData\Roaming\Godot\mono

[Grosskopf]

hi, what folder would that relate to in linux? :D i would love to use Mono in linux and just downgraded mono to 5.12 for that, but i'm experiencing this bug now

[Grosskopf]

i'm guessing .local/share/mono :) works now

[11clock]

@David-Ochoa Didn't work for me.

[11clock]

In the Editor Settings, I switched the Build Tool in "Builds" to MSBuild (VS Build Tools) and that worked for me. Not sure why the Mono build doesn't work.

[daimeng]

Getting this issue in Godot v3.1 beta 3 x64 mono.
I have Mono 5.18 SDK installed on a Windows x64 platform.

Previously followed directions here: https://github.com/godotengine/godot/issues/20013
This allowed me to get farther and not have ~20 errors on opening editor or trying to build.

Now I have the 1 Error above. Switching to VS Build seems to work also for me.

In my error log on build I see this #23825

[neikeq]

I'm closing this as a duplicate of #23825. Let me know if that's not the case.

We're defaulting to MSBuild (VS Build Tools) where the problem is not present.